Most advanced component group of all time: The Shimano Dura Ace WH-R9100-C40-CL Wheelset

Two forces combine to slow down riders: air drag and inertia. DURA-ACE R9100 wheels are designed to combat these forces through aerodynamic features and reduced rolling resistance. Two new 28mm wide C60 and C40 rim platforms bring a stiffer wheel to enhance forward and side-to-side (lateral) power transfer and, with ultra-light carbon rim heights of 60mm and 40mm, are also designed to reduce air resistance. This allows Dura Ace R9100 C60 wheels, in a real world scenario, to save 16W over Shimano’s current DURA-ACE 9000 C50 wheelset. C24 wheels complete the DURA-ACE lineup giving riders three rim heights to choose from (60mm, 40mm and 24mm). Selected wheels are available as clincher, tubular or tubeless versions with Shimano quick release hubs and the option of road E-thru axles (12mm).

Engineered for the next generation of race bike, DURA-ACE R9100 offers top-tier performance across numerous configurations. Available with either Di2 electronic or mechanical shifting, for the first time, riders now have the option of premium DURA-ACE hydraulic disc brake performance. New Shimano technologies further integrate the DURA-ACE as a system, including a new power meter, while riders further integrate with their bike through new E-Tube wireless connectivity. Shimano’s Rider Tuned philosophy and customization of the bicycle’s function also expands with a wider range drivetrain that now includes intuitive Shimano Synchro Shift control.

KEY FEATURES:

Responsive acceleration

Improved drive rigidity

OPTBAL spoke system

Lightweight within rigid

Carbon laminate rim

Efficient drive train

Best all-round wheelset

Balanced low inertia & aerodynamics

Wide section rim

PRODUCT FEATURES:

Use: Road, Triathlon

Model: WH-R9100-C40-CL

Rim Type: Clincher

Wheel size: 28"

Rim Size: 622 X 17C (700C)

Brake Type: Rim brake

Cassette Compatibility: Shimano 10-/11-speed

Over Locknut: front 100mm / rear 130mm

Axle Fixing method: Quick release

QR Skewer Length: front 133mm / rear 168mm

Axle Length: front 108mm / rear 141mm

Contact Seal: Labyrinth and Contact

Rim Height: front 35mm / rear 35mm (without tires)

Rim Width inner: front 17mm / rear 17mm

Rim Width outer: front 20.8mm / rear 20.8mm

Rim Tape Recommended: Yes

Spokes: front 16 / rear 21

Tire Recommended Size: 23x622 - 32x622

MATERIAL:

Rim: Carbon/Aluminum

Hub: Aluminum

Freehub: Titanium

Spokes: Stainless steel

Nipples: Aluminum

COLOR:

Black

WEIGHT:

674g (front)

830g (rear)

SCOPE OF DELIVERY:

1 x Dura Ace WH-R9100-C40-CL Wheelset

2 x Quick release

2 x Rim tape

2 x Valve extension

2 x Spoke wrench

1 x Adapter 11-speed

TECHNOLOGIES:

OPTBAL Spoke System

The OPTBAL rear wheel spoke system features 21 spokes - 14 on the drive side and 7 on the non-drive side. Cassette spacing in today’s wheels produces unbalanced tension in traditional 1:1 spoke systems. This unbalance is intensified with the 11-speed cassette, producing nearly double the tension on the drive side spokes. Generally high and low tension spokes have respectively tendency toward breaking down and coming loose spoke nipples. Unbalanced tension affects durability and strength. The OPTBAL design rebalances spoke tension, enhancing wheel rigidity and strength for a more durable wheel.